Motor-driven propeller set



, H. F. SCHMIDT MOTOR-DRIVEN PROPELLER SET Filed Sept. 5, 1921. 2Sheets-Shae; 1

Henrq F.

AITOR-NEY Mar. 3, 1925. 1,528,083

7 H. F. SCHMIDT MOTOR DRIVEN PROPELLER SET Filed Sept. 5, 1921 2sheets-slfeet' 2 INVENTOR Henrq F. Schmidt BY AITORNEY 45 means 11' andPatented Mar. 3, 1925.

UNITED. STATES PATENT OFFICE.

HENRY r. scmnnr, or swna'rnmonn, rnmtsvnvnmn, assronon .ro'wns'rmenorrsn ELECTRIC AND mmrracrunme oomrm, n oonrorwrron ,ori rm-SYLVANIA.

MOTOBPDI IIVEN PROPELLER SET.

To all whom it may concern:

.Be it known that I, HENRY F. SCHMIDT, a citizen of the United States,and a resident of Swarthmore, in the county of Delaware and State ofPennsylvania, have invented a new and useful Improvement in Motor-Driven Propeller Sets, of which the followin is a specification.

his invention relates to pumps and more particularl to motor drivenpropeller pumps an it has for its object toprovide apparatus of thecharacter designated in w ch a motor for driving the pump and the drivenpump elements may be assembled:

' within a single compact and accessible housing from which thepropeller elements may be readily removed for the purposes of cleaningand repair.

With the above and other-objects in view,

0 the invention consists of 'novel features of construction andcombinations of parts, as will be hereinafter more clearly set forth inthe specification.

In the drawing, Fig. 1 is a longitudinal 25 view, in section, showing amotor-pump set assembled in accordance with myinvention; Fig. 2 is a.similar view showing a'motor- -pump set employing a vortex pump; and

- Fig. 3 is a modification of the construction ao illustrated in'Fig. 1,in which the pump casing is divided into several parts;

The present invention contemplates a motor-pump set comprising :a' pumpcasing and a motor casing arranged to form a. com- Referring to the drawng for a more detailed understanding of my invention, I

show in Fig. 1' a motor-pum set in which indicates a pum casing aving aninlet ischarge means 12. The pump inlet and discharge means lland 12 areprovided with suitably constructed flanges 13 and 14 adapted to securethe pump setv to the apparatus with which the ump is 50 to be employed,as, for example, adis washin machine. The pump casing is preferab in theform of a convergin -diver 'ng U-s aped passage, the throat 0 whic ispact unit housing. The motor casing ear situated at the bottom of the 'Uadjacent the inlet side. The. pum casing 101s pro- 5 vided with a milledange portion 15 adapted to be secured to a cooperating flange of a motorcasingl16 in any suitable manner. As shown, t e two casmgs'are securedtogether by a thumb screw 17.

The motor casing 16 is provided with a tapered portion 18 wdiich extendsinto the interior of the pump casing 10. The tapered portion 18 has arecess 19 provided therein which defines a smooth assage from the bottomof the casing to t e outlet .12. The free end of the tapered portionforms 'a protruding hollow conical stem 20 which accommodates a shaft21." Suitable packing means j v 22 surround the shaft within the stem 2010 and serve to prevent any fluid leakage along the shaft into the motorcasing. Secured at the extremity of the stem 20 and located at thedivergingportion of the bottom of the U-sha ed passage adjacent thethroat are suitab y arranged guide vanes 23 which are adapted to fitwithin a pump chamber. A propeller 24 carried by the'shaft 21 ispositioned adjacent tothe fluid directin vanes 23. The assemblage of.the pump e ements is such that the propeller operates at the throat ofthe pump and discharges the fluid' into the portion of the casin inwhich the guide vanes 23 are dispose The guide vanes 23 and propeller 24are designed to 85. conform to the diverging portion of the pump casing10 so that they may be readily removed from the pump casing when the twocasings 10 and 16 are separated. The motor casing 16 houses a suitablemotive power device directly connected .to the propeller 24 by the shaft21. As shown, an electric motor25'1ocated within the casing drives thepropeller 24, this arrangement providing a compact apparatus.

In Fig. 2 I indicate a rotary pump set composed of a volute pump casingand a motor casing 31 secured thereto. The pump j casin 30 is providedwith inlet means 32 L and ischarge means 33. In a similar man- 100 ner"to that described above in relation to- V Fig. 1, the motor casing 31carries integrally therewith'a reduced portion 34 which extends into thepump casing 30. Likewise, the reduced portion 34 carries a propeller35-10 which is arranged at the throat of the inlet I portion of'the pumpcasing. Provision is made for supporting the vortex-pump set by asuitable flange means 36 provided at the inlet portion of the pump.casing 30.

In Fig. 3 I show a motor-pump set composed of three casing membersforming a unit housing. I indicate at 40 a motor casing member to whicha pump casing inlet member 41 and a discharge member 42 are attached,these being separate castings and the several parts being joined byscrew joints 43 and 44. As described in connection with the motor setsshown in Figs. 1 and 2, the motor casing 40 is provided with a curvedreduced portion 45, which extends into the pump casing 41 and, asfurther described, the reduced portion carries a shaft 46 and apropeller 47 attached thereto. The casing member 42 is provided withguide vanes 48 designed to direct the flow of the fluid discharged fromthe propeller 47, which operates adjacent thereto. The constructionpermits access to the pump parts because of the detachability of thecasings 41 and 42 at joint 44.

In the several modifications, of the in- 7 vention a compact motor-pumpis provided in which the operating parts are made read-- ily accessiblefor cleaning and repair. As illustrated in Fig. 1,-the motor set iscomposed of the pump casing 10 and a motor casing 16.. The arrangementis such that the pump casing 10 may rigidly support the motor-pump setand for the purpose of cleaning and repair, the motor casing 16 may bedetached from the pump casing 10 by loosening the thumb screws 17. Itwill be observed, as heretofore pointed out, that by removing the motorcasing 16 the pump parts are readily made accessible.

The arrangement shown in Fig. 2 illustrates a compact motor vortex pumpset. The motor setis preferably supported by a flange 36 formed at theinlet of the pump casing. This construction permits the building up of apump which occupies a small space and which has a relatively largecapacity. An advantageobtained in this type of pump is that theefiiciency is the same at all discharge angles from the propeller. Thatis, the eflicienc of the vortex chamber is constant for al loads.

The arrangement shown in Fig. 3 is particularly adaptable forcirculating cooling water, as for example, in an automobile coolingsystem. It will be observed that the arrangement of this motor-pump setis such that it may be readily supported by the hose connections owingto the fact that the motor-pump set weighs approximately only fourpounds. Should the pump need cleaning or repairing for any reason, thepump elements maybe removed by unscrewing the motor casing 40 from theinlet casing 41, at 44. With such an assemblage the parts or connectionsbetween the 'fluid delivery passages need not be broken. If it isdesired that the pump be more rigidly supported, the assemblage shown inFig. 1 may be used with facility.

lVhile I have shown my invention in three forms, it will be obvious tothose skilled in the art that it is not so limited, but is susceptibleofvarious other changes and modifications withoutdeparting from the spiritthereof, and I desire, therefore, that only such limitations shall beplaced thereupon as are imposed by the prior art or as are specificallyset forth in the appended claims.

What I claim is:

1. In a propeller pump unit, the combination of a motor casing and apump casing, the latter having an inlet and outlet port, a convergentfluid passage leading from the inlet port to a. throat portion withinthe pumpcasing, a divergent fluid passage leading from said throatportign to the outlet port, a reduced portion of the motor casing beingadapted to fit within the pump casing and a recess being cut into thereduced portion to provide a smooth passage from the inlet port to theoutlet port.

2 A propeller pump comprising a motor casing, a pump casing detachablyfitted thereto, the latter having a convergent inlet and a divergentoutlet at the ends thereof, a tapered portion of the motor casingextending into a co-operating portion of the pump casing,-a recess beingprovided in the tapered portion, and means associated there with fordirecting fiuid through the recess to the outlet port.

3.'A propeller pump unit comprising a motor casing and a pump casing,the latter having inlet and outlet ports, a reduced portion of the motorcasing extending into the' pump casing, a recess being provided in thereduced portion, said recess forming a fluid passage to the outlet port,and guide vanes at the entrance thereof to direct the fluid to theoutlet port.

4. In a propeller pump, the combination of a pump casing and a motorcasing, saidcasings having a ground joint connection, a. propeller inthe pumpcasing and carried by the motor casing, a reduced portion of themotor casing extending within the pump casing, a recess being formed inthe reduced portion, guide vanes carried on the reduced portion andmeans to impart velocity to the fluid.

5. In a propeller nation of a motor casing and a, pump casing, inlet andoutlet ports in the pump casing,

afreduced portion of the motor casing extending into the pump casing,guide vanes carried thereby, and a recess in said reduced portionarranged to co-operate with the pump umt, the OOmbI- pump casing to forma smooth fluid pas-;

- sage to the outlet ports.

. duced portion/fitting into the pump 'ber and designed to define acontinuation 6. A pump set comprising a convergingand diverging pumpChamber terminating in an inlet and outletmeans, said pump chamberhaving an axial opening at one end rovidih a seat a motor driven. ro-

peller unit comprisingapropeller designed to operate within the throatof thecha'm ber, a motor casing provided with a rechamof the interiorcurved surface of the chember, guide vanes carried b thereduced portion,and means for debate ably securing the pump chamber and'pro ller unittogether without disassembling t e: pump parts.

7. Ina propellerpump set, the combination of a casing having fluidinletand discharge passages therein, a U-sheped pump, 20

subscribed my name this 28th day of July,

' P HENRY F. SCHMIDT.

